Title:
磁気装置の温度保護装置および電力装置
Document Type and Number:
Japanese Patent JP5901556
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To miniaturize a magnetic device by accurately estimating the temperature of the magnetic device in a temperature protection device of the magnetic device used for an electric power unit.SOLUTION: A temperature protection device 30 comprises: a current detection section 34 that detects a current I flowing through a reactor L1; a voltage detection section 32 that detects a voltage V between terminals of the reactor L1; a computation section 36 that estimates the temperature of the reactor L1 on the basis of the detection values of the current I and the voltage V; a determination section 40 that controls the output of an electric power unit on the basis of the estimated temperature of the reactor L1; and an initial setting section 38 that stores impedance Zi of the reactor L1 calculated by the computation section 36 at a reference temperature as an initial value. The computation section 36 calculates impedance Z of the reactor L1 from the detection values of the current I and the voltage V and calculates an estimated temperature on the basis of the impedance Z and the initial value Zi using the previously obtained relationship between the impedance and the temperature of the reactor L.
Inventors:
Takao Mitsui
Exit good deed
Uryu Yuta
Exit good deed
Uryu Yuta
Application Number:
JP2013050310A
Publication Date:
April 13, 2016
Filing Date:
March 13, 2013
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01F27/00; H02M3/155
Domestic Patent References:
| JP2262314A | ||||
| JP63013307A | ||||
| JP2009159748A | ||||
| JP2012231646A |
Attorney, Agent or Firm:
Fukami patent office